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Not sure if this is irony or not.

"Brush your teeth" is good advice.

I think "smell nice" is pretty under-rated, though I'd suggest the nicest smell is so smell at all

Personally (at a normal work-interaction distance from someone)

Nothing > normal BO > food > cologne

Yeah, but...do besides a very few people actually have problems with that?

Unlike a lot of problems, odors are easy to fix.